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LINDSAY L STREAM.

\ Grain Fan.

N0. 26.273. Parenied Nov. 29. 1859.

UNrrED s'rATiis PATENT( orrion.

OLIVER LINDSAY AND ROBT. F. STREAN, OF NVASHIGJIN,` FENNSYLVANIA.

GRAIN-FAN.

Specification of Letters Patent No. 26,273, dated November 29, `1859.

1b' all whom 'it may concern:

Be it known that we, OLIVER LINDSAY and ROBERT F. STREAN, of Washington, in the county of Washington and State of Pennsylvania, have invented a new and useful Improvement on the Grain-Fan now in Common Use; and we do hereby declare that the following is a full and exact description of the construction and operation of the same, reference being had to the annexed drawings, making a part of this specification, in which Figure l is a perspective view of the entire fan as arranged for chaiiiiig; Fig. 2 is a perspective view of the shoe as arranged for separating cheat, smut, &c., in second cleaning.

In F ig.` l, A, is a division board hung on a pivot at 0l and moving between the points L b, thus dividing the wind thrown off by the fan into two currents, the under current being greater or less as the division board A is elevated or depressed. B is an inclined plane permanently fastened in the shoe in a line with the division board A and forming as it were, a continuation of the saine. C is the chaiing riddle used in irst cleaning. D is the hopper bottoni and -fastened to the shoe. E is the back board of the hopper and fitting down close and smooth on the hopper bottom. F is the lower and fine riddle operated upon by the wind passing below the division board A. Gr is the screen board hung on or hinged to the shoe at c and resting on a roller at I. H is a roller under the back end of the hopper bottom D.

In Fig2 the parts are the same as described in Fig. l except that the Venetian riddle C is removed and the cheat and smut board K is placed in the shoe from the point L at an inclination toward the out end of the inclined lane B.

To ena le others skilled in machinery to make and use our invention, we will proceed to describe its construction and operation.

W'e construct our fans, frame and out side shell after the usual form of the common grain fan.` The shoe is made to ft close to the inside and hung at the points f g and the back eiid rests on the roller H; the vibration being lengthwise of the fan. We then hang the screen board to the shoe at e and rest the other end upon the roller I, thus giving one and the same motion to the shoe hopper bottom and screen. We then place the inclined plane pernianentlyintlie shoe, `as i shown in the annexed drawings, and in an line with the division board A, for the purpose of compelling all thewind, whichpasses above the divisionboard 3A, to-pass`up` p through the chaiiing riddle thus using all'` the wind directly upon the riddle, and also` for the purpose of carrying the grain to the back end of the lowerriddle `F to subject it to the action of the current of wind which` passes under the division: boardA, and also for `-the furtherpurpose which `will be de` scribed iii Fig. 2.

The division board Asis pvoted at the" point d immediately in` the rear ofthe lower riddle F, and extended inan oblique direcf` tion to the line described bythe perimeteiig of the fan at the point @for the purpose` of dividing the wind into two currents, the

one passingabove the division board A and the inclined plane B up through the chaffing riddle C, the other beneath the division board A up through the wheat riddle F and out beneath the inclined plane B, thus by means of the division board? A and thein-N clined plane B the` grain is subjected to two processes and two currents of wind while passing once through the fan. The divisioni l" board A is regulated by a thumb screw,`as

shown at la, and may be set at any point bef` tween the points a b, for the purpose of i passing a greater or less portion `of wind.

above or below the division` board A as the*` circumstances of the grain may require.`

The riddle F is made as any' other common y wire riddle.

The chaiiing riddle C` may be constructed as any of the common wire riddles but we have made it in thelform` of a Venetian as,`

shown in the annexed drawings, Fig. 1, the

slats being made of "wood or` iron about of an inch wide and g thick and placed about l` inch apart, wire being drawnat .i

right angles to the slots about l inch a art and fastened to them. y The back end o the hopper bottom D is hopper board E an H; The hopper board E ismade to fit down close and smooth to the hopper bottom D, and we then give the same vibration to the hopper bottom D as to the shoe and make it to pass back and forth beneath hopper` the` board E for the purpose of `pushing grain forward in the hopper and making it a self feeder. t

Fig. 2 represents the shoe as arranged for y assed outbeneath the y rests upon the roller t.

passing grain through the second time. The

`chatting riddle C is removed and the cheat passes down the inclined plane Bthe wind carrying substances lighter than the grain up the plane, while the grain,l its weight being greater than the force of the wind,

. passes down and falls on the lower riddle F where it is again exposed to the current of wind passing beneath the division board A and the inclined plane B.

The first process is simply this; the grain in the chaff 'is thrown into the hopper and by the action of the bottom D and the back E it is pushed forward upon the riddle C and being exposed to the current above the division board A and the inclined plane B the chaff is carried off; by means of the inclined plane B the grain is thrown back upon the in end of the lower riddle F and exposed to the current which passes beneath the division board A and the inclined Yplane B; it then passes down the screen board Gr, in which is inserted a large screen, to the place of general delivery.

The second process is similarhto the first,

except that the chaing riddle C is removed and the cheat and smut board K is placed as shown in Fig. 2 and the grain exposed to a strong current upon the inclined plane B.

We do not claim broadly and irrespective of construction and arrangement a grain fan, for such devices have been in common use and arranged in various ways. Neither do We claim, simply and independent of each other, the division board A; the inclined plane B; the screen board Gr; or'the riddles C and F, for these, or their equivalents, are in common use: but

We claim- The combination of division board A with the inclined plane B, the screen board G, and the riddles C and F when the same are united in the peculiar manner above described, and arranged to operate in the relation to each other and to the currents of wind thrown oiE by the fan, as fully shown in Fig. l substantially as and for the purpose set forth and specified.

OLIVER LINDSAY. ROBT. F. STREAN.

Witnesses:

JESSE JORDAN, D. S. FLINDER. 

